计算纯文本文件中char的出现次数

def count_char(file_path, char):
    count = 0
    with open(file_path, 'r') as file:
        for line in file:
            count += line.count(char)
    return count

file_path = 'example.txt'
char = 'a'
count = count_char(file_path, char)
print(f"The character '{char}' appears {count} times in the file {file_path}.")